var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');//浏览器的icon
var logger = require('morgan');//日至输出
var cookieParser = require('cookie-parser');//cookie转化
var bodyParser = require('body-parser');//对返回值进行转换
var ejs = require('ejs');
var index = require('./routes/index');//首页路由 
var users = require('./routes/users');
var goods = require('./routes/goods');

var app = express();

// view engine setup模板引擎
app.set('views', path.join(__dirname, 'views'));//设置引擎
app.engine('.html',ejs.__express);
app.set('view engine', 'html');

// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));//join就相当于衔接

//登录拦截
app.use(function(req,res,next){
	if(req.cookies.userId){
		next();//取客户端的cookie
	}else{
		if(req.originalUrl == '/users/login' || req.originalUrl == '/users/register' || req.originalUrl == '/users/logout' || req.path =='/goods/list'){
			//原始的url
            next();
		}else{
            res.json({
            	status:'10001',
            	msg:'当前未登录',
            	result:''
            });
		}
	}
})



//设置路由
app.use('/', index);
app.use('/users', users);
app.use('/goods',goods);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);//下一步执 行
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;
